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    <title>Document</title>
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<script>        //str.split(分隔符)  将字符串以特定的分隔符分割
//得到子字符串，将子字符串作为数组的数组元素，返回该数组
    var str ="?username=zhangsan&age=20&sex=male";
    str =str.slice(1);
    var arr= str.split("&");
    console.log(arr);
    for(var i=0;i<arr.length;i++){      
      var childArr =  arr[i].split("=");
      console.log(childArr[1]);
    }
    </script>
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